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III. Outage Causes <br />Equipment failure, extreme weather events, wildlife, and vegetation are some of the most <br />common causes of electric system outages.The following pie chart shows the percentages of <br />the primary causes of outages for all utilities using the eReliability Tracker in 2023. <br />weather <br />wildlife 17 8% <br />18.7% <br />21.5% <br />equipment <br />4.4% <br />utility human error <br />power supply <br />public <br />9.9% <br />14.9°Io scheduled <br />11.5°/0 <br />vegetation <br />unknown <br />Figure 8. Primary causes of outages in 2023 <br />Certain factors, such as regional weather and animal/vegetation patterns, can make some <br />5apmaEpno6rAiptimmI'Ehefotlewftisection includes graphs <br />depicting common causes of outages for your utility, all utilities in your region, and all utilities <br />using the eReliability Tracker. <br />@ihBrte!c rmtaining aggregate information are customer -weighted to account for di <br />utility size for a better analytical comparison. For example, a particularly large utility may have <br />a large number of outages compared to a small utility. To avoid skewing the data toward large <br />utilities, the number of cause occurrences is divided by customer size to account for the <br />205 <br />